Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab689b457f7ca751…

MALICIOUS

PDF

64.4 KB Created: 2020-11-24 06:40:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 7308d5cf0c763a2a6a15eacd7e059104 SHA-1: 391dba4414061b2fb26268cb71ec0142b2963bff SHA-256: ab689b457f7ca7512bce58a90b68f6bc74eeca788b9c06a5acbdef82c2ecfceb
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a security-bypass lure. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://traffnew.ru/strik?utm_term=download+kernel+4.0+for+galaxy+note+2 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4459025/normal_5fb770820c0ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366018/normal_5f8b4a535778f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371509/normal_5f8b0c60b2e36.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480595/normal_5fb709a9b18a3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/20a4d1ba-c468-41d5-a8ef-818ae42915cd/wikikibabileteted.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91d77145-cd26-45d5-982b-94fbce68bd75/59974196858.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0165e2f2-1a80-48b7-bb32-80b71680987a/fematu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4dec421-ee5c-44fc-99ab-a3962e675e17/kevikurogujelukuloro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02fbd423-4efa-4ed5-86c5-c8fa8a225096/fezagowefu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/049d93b6-1afa-4844-9bb8-57490f54d11c/22364607638.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cf1b9f3-f005-4324-ad14-9375fe6332cc/7413555566.pdfIn PDF document text
    • https://s3.amazonaws.com/nopomewegobij/vibilosudogiguvamez.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/award_template_microsoft_word.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/434e3f7c-ed03-484e-a75e-3dbc5feca188/puveripapofekimigemu.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bbef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBEF 5616 bytes
SHA-256: 44b8c4f88ced0815e107d4c7ef5c24b13d0f2f38eef1862fb2d6b9b3fd2f98b9
font_01_sfnt_off0000cf53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF53 11352 bytes
SHA-256: 6b8d17aaeb02f51d9fffb7fe3e9bfc0ca54d3b7b1c0ef4078f913cf9e275b69a

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